Danfoss DSH090 Application Manual page 20

Scroll compressors, DSH090 to DSH600 | Operating envelope data
Figure 9: R452B / R454B - DSH240 to DSH600 ( Max. DGT 150°C)
-40 -31 -22
70
65
60
55
50
45
40
35
30
25
20
15
10
5
-40 -35 -30
 NOTE:
The application envelope of a cross-platform manifold results in the conjunction of map limitations of compressors
composing the tandem.
Pressure settings
Table 13: Pressure settings
Pressure settings
Working range high side
Working range low side
Maximum high pressure safety switch setting
Minimum low pressure safety switch setting
Minimum low pressure pump-down switch setting
High and low pressure protection
Low-pressure (LP) and high-pressure (HP) safety switches must never be bypassed nor delayed and must stop all
the compressors.
LP switch auto restart must be limited to 5 times within 12 hours.
HP safety switch must be reset manually.
Depending on application operating envelope, you must define HP and LP limits within operating envelope and
pressure setting table above.
© Danfoss | Climate Solutions | 2022.10
Evaporating temperature (°F)
-13 -4 5 14
S.H. = 5 K (9°F)
-25 -20 -15 -10
Evaporating temperature (°C)
bar(g)
psig
bar(g)
psig
bar(g)
psig
bar(g)
psig
bar(g)
psig
23 32 41 50
S.H. = 30 K (54°F)
-5 0 5 10
R410A
9.9-44.7
144-648
1.7-15.5
25-225
46.1
669
1.5
22
1.5 bar below nominal evap. pressure with minimum of 1.7 bar(g)
22 psi below nominal evap. pressure with minimum of 25 psig
59 68 77 86
158
149
140
131
122
113
104
95
86
77
68
59
50
41
15 20 25 30
R452B / R454B
9-41.7
131-605
1.7-14.4
25-209
43.1
625
1.5
22
AB288965961751en-001402 | 20
CC-000041